That Time I Got Reincarnated as a Slime (2018)

S1E12 The Gears Spin Out of Control

The Orc army, under the command of the Orc Lord, relentlessly advances through the Great Forest of Jura. This escalating threat has prompted Treyni, the Dryad guardian of the forest, to spring into action. Having observed Rimuru's growing influence and success in the region, she seeks his help to overthrow the Orc Lord and protect their home.